Yesterday, I was asked a question about a sign that can be seen in many windows of Tokyo buildings.
Since searching on the web gave no result and this seems an interesting thing to know, I want to share this picture with you.
So... what's the purpose / meaning of that red triangle?
I think Cocosan can help us!

Yes I've fixed the answer. ( made phone call and asked fire department)
zengargoyle-san 's is correct.
But they can not say easy to break, so they say "easy to enter ( ppl must not place stuff near the window with ▼ , etc .)" .
I think not so many Japanese know what is the purpose of it. ( I didn't know what exactly is. :p)
Anyway good to know, Thanks Txkun.

Last edited by coco on Thu 04.06.2006 4:38 am, edited 1 time in total.

Haha yeh... I asked a few Japanese people before I found that answer. A lot just don't know the real reason those red arrows are there. But its nice to know this little bit of information about Japanase buildings.